/****************************************************************
 *								*
 *	Copyright 2001, 2007 Fidelity Information Services, Inc	*
 *								*
 *	This source code contains the intellectual property	*
 *	of its copyright holder(s), and is made available	*
 *	under a license.  If you do not know the terms of	*
 *	the license, please stop and do not read further.	*
 *								*
 ****************************************************************/

/*
 *  omi_prc_ordr.c ---
 *
 *	Process a ORDER request.
 *
 */

#ifndef lint
static char rcsid[] = "$Header:$";
#endif

#include "mdef.h"

#include "gtm_string.h"

#include "omi.h"
#include "error.h"
#include "gdsroot.h"
#include "gtm_facility.h"
#include "fileinfo.h"
#include "gdsbt.h"
#include "gdsfhead.h"
#include "stringpool.h"
#include "op.h"


int
omi_prc_ordr(omi_conn *cptr, char *xend, char *buff, char *bend)
{
    GBLREF gv_namehead	*gv_target;
    GBLREF gv_key	*gv_currkey;
    GBLREF gv_key	*gv_altkey;
    GBLREF bool		 gv_curr_subsc_null;
    GBLREF bool		 undef_inhibit;

    char		*bptr;
    int			 rv;
    omi_li		 len;
    mval		 vo, vd, vg;

    bptr = buff;

/*  Global Ref */
    OMI_LI_READ(&len, cptr->xptr);
/*  Condition handler for DBMS operations */
    ESTABLISH_RET(omi_dbms_ch,0);
    rv = omi_gvextnam(cptr, len.value, cptr->xptr);
/*  If true, there was an error finding the global reference in the DBMS */
    if (rv < 0)
    {
	REVERT;
	return rv;
    }
    cptr->xptr += len.value;

/*  Bounds checking */
    if (cptr->xptr > xend)
    {
	REVERT;
	return -OMI_ER_PR_INVMSGFMT;
    }

/*  We want to make sure there is plenty of space in the string pool
 *  for all three operations ($ORDER, $GET, $DATA) */
    if (cptr->exts & OMI_XTF_NEWOP)
	stp_gcol(0);

/*  $ORDER */
    op_gvorder(&vo);
/*  $ORDER (buffer write) */
    OMI_SI_WRIT(vo.str.len, bptr);
    if (vo.str.len)
    {
	memcpy(bptr, vo.str.addr, vo.str.len);
	bptr += vo.str.len;
    }

/*  Bunching */
    if (cptr->exts & OMI_XTF_NEWOP)
    {
	if (vo.str.len)
	{
	    if (!gv_currkey->prev)
	    {
		if (*vo.str.addr != '^')
		{
		    REVERT;
		    return -OMI_ER_PR_INVGLOBREF;
		}
		vo.str.addr++;	vo.str.len--;
		gv_bind_name(cptr->ga, &vo.str);
		vo.str.addr--;	vo.str.len++;
		gv_curr_subsc_null = FALSE;
	    }
	    else
	    {
		if (gv_currkey->top != gv_altkey->top)
		{
		    REVERT
		    return -OMI_ER_DB_UNRECOVER;
		}
		memcpy(gv_currkey, gv_altkey,
		       gv_altkey->end + sizeof(gv_key));
		gv_curr_subsc_null = FALSE;
	    }

/*	    $DATA */
	    op_gvdata(&vd);
	    if (!(vd.mvtype & MV_INT))
	    {
		    REVERT;
		    return -OMI_ER_DB_UNRECOVER;
	    }
/*	    $GET */
	    undef_inhibit = TRUE;
	    rv = op_gvget(&vg);
/*	    $DATA (buffer write) */
	    OMI_SI_WRIT(vd.m[1] / MV_BIAS, bptr);
/*	    $GET (buffer write) */
	    OMI_SI_WRIT((rv ? 1 : 0), bptr);
	    if (!rv || !vg.str.len)
		OMI_LI_WRIT(0, bptr);
	    else {
		OMI_LI_WRIT(vg.str.len, bptr);
		memcpy(bptr, vg.str.addr, vg.str.len);
		bptr += vg.str.len;
	    }
	}
/*	Otherwise $ORDER returned a null */
	else {
/*	    $DATA (buffer write) */
	    OMI_SI_WRIT(0, bptr);
/*	    $GET (buffer write) */
	    OMI_SI_WRIT(0, bptr);
	    OMI_LI_WRIT(0, bptr);
	}
    }

    REVERT;

    return (int)(bptr - buff);

}
